Linear Encoder

Linear encoders consist of a read head (sensor) and a reference scale (measuring element). The non-contact principle of operation means that the position is determined without wear. The sensor uses a unique code pattern to record the absolute position information along the reference scale, and sends this information directly to the evaluation electronics. As a result, there is no need for a reference run. Compact systems with high resolutions or rugged solutions with very high measuring lengths (up to 1,700 m) can be used in a wide range of applications.

The encoder can be either incremental or absolute. Motion can be determined by change in position over time. Linear encoder technologies include optical, magnetic, inductive, capacitive and eddy current.